A normal coronary CT scan means the heart arteries are not showing significant blockages, which is reassuring. However, palpitations and dizziness can still occur for many reasons other than blocked heart arteries. Common reasons include anxiety or stress, irregular heartbeat, low blood pressure, anaemia, dehydration, thyroid problems, low blood sugar, side effects of medicines, or inner ear balance problems. It is important to consult your doctor for proper evaluation, as tests such as ECG, blood tests, blood pressure checks, or heart rhythm monitoring may be needed to identify the exact cause. If symptoms are severe or associated with fainting, chest pain, breathlessness, or sweating, seek urgent medical care immediately.